A Monumental Royal Vienna Porcelain Plaque

Continental, finely painted plaque depicting the Virgin and Jesus with St. John the Baptist and Elizabeth, beehive mark in underglaze blue with smaller stamped beehive mark on back, indistinguishably inscribed signature with an "X" below, 20-3/4 x 16-1/2 in.; 19th century giltwood and composition frame, 28-1/4 x 23-1/2 in.˜Provenance: Private Collection, Oklahoma City, Oklahoma
Condition Report: good overall with dimpling and other minor pin holes, small chip to corner, other minor scratches and typical wear; frames with losses and resurfacing, possibly originalÿ